HP Integrity NonStop J-Series - Manual (Page 40)

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©Copyright 1996 Rogue Wave Software
Indexing
Indexes have type size_t, an unsigned integral type defined by your compiler, usually in
<stddef.h>. Because size_t is unsigned, it allows indexes up to 64k minus one under 16-bit
DOS.
Invalid indexes are signified by the special value RW_NPOS, defined in <rw/defs.h>.